To the dismay (and ongoing annoyance) of many colleagues – yes, you know who you are – I’ve spent years pushing back on the casual use of the term “Intentionally Defective Grantor Trust” (“IDGT”).
Used incorrectly, it can be dangerous.
An “IDGT” is typically understood to mean a trust that is:
- Complete for gift tax purposes (assets are out of the estate), and
- Defective for income tax purposes (the grantor still pays the income tax)
Certain retained powers (think: power of substitution) can create this split treatment.
And yes, when done correctly, there are real planning benefits.
Here is the trap:
Not every irrevocable trust is a completed gift!
So what? It’s just semantics, right?
Here is an example:
Helen was worried about her ability to manage her assets as she got older and was faced with some health issues. Her attorney recommended putting assets into an irrevocable trust for her benefit and hiring a trust company as trustee to manage the assets and to help her with budgeting.
The well-intentioned associate at the trust company onboarding her account saw:
“Irrevocable trust + grantor trust = IDGT.”
And coded it that way.
What could go wrong?
The assets were primarily low-basis, highly appreciated stock (read: built-in gain). You see where this is headed?
On Helen’s death, the trust assets were to be distributed to her nieces and nephews. Because the trust was coded as IDGT, the associate handling the trust on Helen’s death assumed the assets were not entitled to a step-up in basis (in his defense, a true IDGT is not entitled to a step-up). Therefore, the trustee made no basis adjustments, and the nieces and nephews inherited a whole lot of built-in capital gain.
In reality, Helen’s trust was never a completed gift and therefore never a true IDGT. The assets were entitled to a step-up in basis. The nieces and nephews should receive those assets with a fair market value basis, and no gain.
Say it with me: “it’s not an IDGT unless you know for sure it was a completed gift”!
If not, it’s an irrevocable grantor trust. The distinction matters.
What do you think? Do you see this happen in your organization where shorthand terminology leads to incorrect administration or tax decisions?
To learn more, or if you would like a second set of eyes on a trust structure or administration approach, please reach out: www.blackbirdtrust.com or via email at [email protected].
For educational purposes only, not to be construed as legal or tax advice.


